鈥?/div>
Negative output from positive input
Wide Input Range
Self-Contained Inductor
Short Circuit Protection
Over-T
emperature Protection
Fast Transient Response
The PT78NR200 series creates
negative output voltage from a posi-
tive input voltage greater than 9V.
These easy-to-use, 3-terminal, Inte-
grated Switching Regulators (ISRs)
have maximum output power of 10 to
12 watts and a negative output voltage
that is laser trimmed. They also have
excellent line and load regulation.
The PT78NR200 requires 100
LFM of airflow at its maximum
output current.
Pin-Out Information
Pin
1
Ordering Information
Function
+V
i
n
-V
out
GND
PT78NR2
XX
Output Voltage
52
= -5.2 Volts
06
= -6.0 Volts
12
= -12.0 Volts
15
= -15.0 Volts
Y
Package Suffix
H
= Horizontal Mount
S
= Surface Mount
V
= Vertical Mount
Standard Application
Vin
+
1
2
3
-Vout
PT78NR200
3
2
C1
COM
C2
+
COM
C1 = Required 100碌F electrolytic
C2 = Required 100碌F electrolytic
(For dimensions and PC board layout, see
Package Styles 600 and 610.)
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Short Circuit Current
Inrush Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
(with 100碌F output cap)
Efficiency
Switching Frequency
Absolute Maximum
Operating Temperaturte Range
Recommended Operating
Temperature Range
Thermal Resistance
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
Symbols
I
o
I
sc
I
ir
t
ir
V
in
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
畏
茠
o
T
a
T
a
Conditions
Pkg Style 600
PT78NR200 SERIES
Min
V
o
= -5.2V
V
o
= -12.0V
0.1*
0.1*
鈥?/div>
鈥?/div>
鈥?/div>
9
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
600
0
0
鈥?/div>
-40
鈥?/div>
鈥?/div>
鈥?/div>
Typ
鈥?/div>
鈥?/div>
4脳I
max
4
0.5
鈥?/div>
鹵1.0
鹵0.5
鹵0.5
鹵2
100
5.0
78
650
鈥?/div>
鈥?/div>
35
鈥?/div>
500
10
11
Max
2.0
1.0
鈥?/div>
鈥?/div>
鈥?/div>
15
鹵3.0
鹵1.0
鹵1.0
鈥?/div>
250
鈥?/div>
鈥?/div>
700
+85
+60**
鈥?/div>
+125
鈥?/div>
鈥?/div>
Units
A
A
Apk
A
mSec
V
%V
o
%V
o
%V
o
%V
o
碌Sec
%V
o
%
kHz
擄C
擄C
擄C/W
擄C
G鈥檚
G鈥檚
Grams
Over V
in
range
V
in
=10V
V
in
=10V
On start-up
0.1
鈮?/div>
I
o
鈮?/div>
I
max
Over V
in
range
T
a
= 0擄C to +70擄C
Over V
in
range
0.3
鈮?/div>
I
o
鈮?/div>
I
max
V
in
=10V, I
o
=I
max
50% load change
V
o
over/undershoot
V
in
=9V, I
o
=0.5脳I
max
, V
o
=-12V
Over V
in
and I
o
ranges
100 LFM airflow
Over V
in
and I
o
Ranges
100 LFM airflow
Over V
in
and I
o
Ranges
100 LFM airflow
鈥?/div>
Per Mil-STD-883D, Method 2002.3
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
鈥?/div>
胃
ja
T
s
鈥?/div>
鈥?/div>
鈥?/div>
*ISR will operate down to no load with reduced specifications.
**See Thermal Derating chart.
Note:
The PT78NR200 series requires a 100碌F electrolytic or tantalum output capacitor for proper operation in all applications.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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